Imp

Noun

A young or inferior devil; a malevolent supernatural creature, similar to a demon but smaller and less powerful. [from 16th c.]

A baby Tasmanian devil.

(obsolete) A scion, offspring; a child. [15th–19th c.]

(Britain, dialect, obsolete) Something added to, or united with, another, to lengthen it out or repair it, such as an addition to a beehive; a feather inserted in a broken wing of a bird; or a length of twisted hair in a fishing line.